Context Menu Item open a popup through javascript

[Julie]

Hello Telerik Community,
I am working with the radTreeview with a radtreeview context menu.  I need to open a modal popup via javascript from one of the menu items. 
Could you please explain how to go about this.
Thanks in advance.
~Julie

[Shinu]

Hi Julie,

Try the below code for opening a modal RadWindow on clicking the ContextMenuItem.
ASPX:

<telerik:RadTreeView ID="RadTreeView1" Runat="server"  EnableDragAndDrop="true" OnClientContextMenuItemClicking="OnClientContextMenuItemClicking">
<ContextMenus>
<telerik:RadTreeViewContextMenu ID="CMenu">
<Items>
     <telerik:RadMenuItem Text="Show Window"></telerik:RadMenuItem>
     <telerik:RadMenuItem Text="Delete"></telerik:RadMenuItem>
</Items>
</telerik:RadTreeViewContextMenu>
</ContextMenus>
    <Nodes>
       . . .
    </Nodes>
</telerik:RadTreeView>
<telerik:RadWindow ID="RadWindow1" runat="server">
</telerik:RadWindow>

JavaScript:

<script type="text/javascript">
function OnClientContextMenuItemClicking(sender, eventArgs)
{
    var item = eventArgs.get_menuItem();
    if (item.get_text() == "Show Window")
    {
        var oWnd = $find("<%=RadWindow1.ClientID%>");
        oWnd.setUrl('http://www.google.com');    //Set the URL
        oWnd.set_modal(true);
        oWnd.show();
    }
}
</script>

You can also refer to the following online documentation which explains about several ways to open RadWindow from client side.
Opening Windows

Thanks,
Shinu.